Keep or map to internal input attributes and query param names

Adding [openrouteservice](https://openrouteservice.org/dev/#/api-docs/v2) to a graph i came across the following problem:

the api uses attribute and query param names like boundary.country, alternative_routes and boundary.rect.min_lon. On introspection and add command the names are transformed to camelCase i.e. boundaryCountry, alternativeRoutes, boundaryRectMinLon. As a result of this all keys including . or _ will be ignored or cause errors as the camelCased keys match none of the attribute / query params expect by the api.